Stove.



T. P. MURRAY. STOVE. APPLICATION FILED MAY 31.19 1.

1 043,341 I Patented Nov. 5, 1912.

2 SHEETSSHEBT 1.

P. MURRAY.

STOVE. v I APPL1UAT10N FILED MAY 31, 1911. 1,043,341., Patented Nov. 5,1912 2 SHEETS-SHEET 2.

UNITE TATEB PATENT FFIQE.

THOMAS P. MURRAY, OF CHICAGO, ILLINOIS, ASSIGNOR TO ALEXANDER I-I.IRFVELL, OF CHICAGO, ILLINOIS.

STOVE.

Specification of Letters Patent. Application filed May 31, 1911.

Patented Nov. 5, 1912. Serial No. 630,420.

To all whom it may concern:

Be it known that I, THOMAS P. MURRAY, residing atChicago, in=the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Stoves, of which the following is a specification.

Myinvention relates to stoves, and contemplates improved constructionand arrangement whereby a stove may be used in the ordinary capacity oras a tireless stove,

and the invention is more particularly concerned with improved means forcontrolling the fuel supply and air flow.

In the stove of my invention gas, oil, or electricity may be usedas theheating medium, and where flame burners are used it is very importantthat provision be made for properly ventilating the stove to supplysuflicient air to the burners when they are ignited. Provision must alsobe made to close the vent openings when the flame is extinguished andthe stove is to operate on the tireless principle. Again, where flameburne-rs are used provision must be made for safety to assure opening ofthe vents when the burners are ignited so as to prevent choking of theflame and the filling of the stove with gases which might explode.

The main object of my invention is, therefore, to provide improvedconstruction and arrangement which will prevent opening of f the fuelsupply valves'before the vents are opened and to prevent closure-of thevent openings before the fuel supply valves are closed. The ventilationarrangement co1nprises an air opening at the lower part of the stove anda vent opening near the top of the stove, and the invention contemplatesfurther improved means for simultaneously con trolling these ventopenings.

By reference to the accompanying drawings my invention will be clearlyunderstood.

In these drawings F igurel is a front elevational view of a stove withthe door open, Fig. 2 is a sectional view taken on plane 2 2, Fig. 1,the part of the door shown being, however, shown in full, Fig. 3 is asectional view taken on plane 83, Fig. 1, the top plate and burner andthe lower ends of the supporting legs being removed, Fig. 4 is a view ofthe rear wall of the stove body,

showing the damper mechanism for"control' ling the outlet vent, and Fig.5 is a plan View of the air inlet controlling damper plate.'-

The stove body 10 may he of any suitable I lating material or compound13. The front of the stove body is open and provided with a suitabledoor 14. The body part of the stove can be mounted on suitable supports,

such as legs 15, and on top of the body part may be the grid plate 16,below which are burners 1'? fed from pipe 18 in the usual manner.

In the floor of the stove I pro ide a longitudinal opening 19 over whichthe burner 20 is suitably mounted, this burner being connected by meansof a valve 21'with the piping 18, the valve having the cont-rollinglever 22.- Below the stove floor is a metallic plate 23 having thesegmental inlet openings 24 below the inlet 19. The passageways throughthese segmental openings are controllable by a damper plate 25 havingthe segmental ends 25 and pivoted at its center 26 to the plate 23between the segmental openings 24 therethrough. By rotation of thedamper plate about its pivot the openings 24 can be en tirely closed oropened to any extent to allow the inflow of air to supply the burner 20when ignited. The front end 27 of the damper. plate extends forwardlybeyond the stove body and through a slot 28 through the base frame 29,and secured to the front of the damper plate is a handle 30, by means ofmediate point 37 to the back of the stove,

and its lower end extends downwardly and a short distance through a slot38 in the extension 39 from the rear end of the damper plate 25, thisextension projecting through the slot 40 in the base flange 29. Withthis arrangement rotation of the damper plate will cause simultaneousrotation of the blade 36. If the damper plate is swung in clockwisedirection (Fig. 2)- to open the inlet vents 24, the blade 36 will berotated counterclockwise and its arcuate end 35 moved out- Wardly ofthevalve frame 32 to open the i upper vent 31 so that both inlet and outletvents are simultaneously opened. -If the damper plate is moved incounterclockwise direction the blade 36 will be moved in clockprovidemeans which will prevent opening ofthe fuel supply valve until thevent-s have been opened and to prevent closing of the vents before thevalve is closed. As shown, a

locking arm 41 extends upwardly from the front end of the damper plateand its upper end ll extends laterally parallel with and in'front of.the valve lever 22. In the full line position shown the vents areclosed, and' the end 41 of the locking arm is in front of the lever 22to prevent rotation of thislever to open the valve.. Before the valvecan be opened to admit gas to the 'burner the damper plate 25 must berotated'in clockwise direction to open the vents and to carry the end411 of the locking arm to the left of the valve lever 22, (see dottedlines Figs. 4and 5) whereupon this valve lever can be rotated to openthe valve and the burner then ignited. Thus, opening of the vents isabsolutely assured before-the fuel supply valve can be opened.If'R'lS-nOW desired to extinguish the burner the valve can be readilyclosed independently of the vents, but the vents can not be closedwithout at the same time-causing closure of the'burner valve, for assoon asthe damper .plate is rotated toward closed position the end" 41'of the locking arm will strike the valve lever 22 and will automaticallyeffect closure of the valve. It is therefore also impossible to closethe vents without at the same time effecting closure ofthe valve toextinguish the burner. It is Itherefore impossible at any time for theburner tov be ignited unless the vents are'open, and the accumulation ofgas and explosions are therefore entirely prevented, and the stoverendered safe.

' If it is desired to use the stove in the ordinary capacity the damperplate is swung to' open the vents and the burner within the stove canthen be ignited, and cooking, baking,'etc., accomplished. If, afterprelimi nary heating 'of the stove contents by the ignitedburner, it isdesired to complete the cooking, baking or other operation on the 55,fireless principle, the valve can be turned to extinguish. the burnerand the damper plate then moved to close the vents, or the damper platecan beswung to'closed position to close the vents and to simultaneouslyeffect closure of the .fuel. supply valve. Upper and lower hot plates 43and 44 can be provided for storing heat when the burner is ignited andfor giving off the heat when the ,b1 1rner isextinguished, and the lowerhot plate 44: preferably has openings 45 for allowinglthe heat from theburner to pass upwardly to the stove" andcontentsand to the upper hotplate. For supporting the;

cooking utensils ordinary grids 46 may be provided and'supported on sideracks 47."

I thus provide simple yet very efficient elfectively controlling therelative fuel and air supply in the stove to render its use absolutely.safe. The damper'plate and the outlet controlling blade 36 can bereadilystamped from 'fsheet metal, or .thesefparts may be in thef orm ofcastings. l a

I do not of course desir'e'to be limited to the precise construction "anshown, as changes are possible which would arrangement still come withinthescopeof the invention,

therefore claim the following 1, .1. Ina stove,- the combinationof-insulatings below said burner iya' damper' platepivoted to berotatedto 'openf,orlclose said-air ing-retaimngwalls form ng acompartment, 1 a burner within said compartment, the'tfloor of saidcompartment li' a'vi lig .air inlet open inlet openings,saidg'compartment havingan outlet op'emng' aearjits' uppereiidyafvalve 5blade pivoted at anZintermedi-ate pointto a1 l retaining wall ofsaidcom'partment, the up per end'of said valve bladecoiiperating withsaid outletropening upon rotation of said blade to control-the opening;and closure-"of said outlet opening, the -rear lend of said damper platehaving a slot-and the lower end of said'valve blade extending throughsaid slot whereby said damper'plate and valve'blade are pivoted togetherto rotate simultaneously to simultaneously open or close the inlet andoutlet openings, a valv for controlling the fuel supply to sai burner'and having a controlling lever,'and 1 a lockmg arm extending upwardlyfrom said damper plate and having its'upper end adjacent saidvalve-controlling lever to lock said lever against 0 ening movement whenthe damper plate an the valve blade are in position to close the inletandfoutlet opem ings.

2. I ing retaining walls forming. a compartment, a burner. within saidcompartment, the floor. of said compartment having air inlet openingsbelow said burner, a damper platepiw oted to be rotated toopen or closesaid inlet openlngs, sald compartment avingan out;

In a stove, the combination of .insu latletopening near its upper en avalve blade plvoted at an intermedlate point to a retaining wall of saidcompartment, the-upper,- end of said valve blade cooperating" with.

said outlet opening-upon rotation. 'of sai'd blade to controltheop'ening and closure of said outlet openmg, the rear .end of said endof said valve blade extending through said slot whereby said damperplate and damper plate having a slot, and the lower a burner withinsaid, compartment, the floor of said compartment having air inletopenings below -said burner, a damper plate formed entirely of sheetmetal and pivoted to said floor to be rotated to open or close saidinlet openings, said compartment having an outlet opening near its upperend, a valve blade stamped integral of sheet metal and pivoted at anintermediate point to the outside of the rear Wall of said compartmentand adapted to be rotated to control the opening and closure of saidoutlet opening, the rear end of said damper plate having a slot and thelower end of said valve blade extending into said slot whereby movementof said damper plate to control the inlet openings willcausesimultaneous movement of the valve blade to control said outletopening.

4:. In a stove, the combination of insulating retaining Walls forming acompartment,

D a burnerwithin said compartment, the floor of said compartment havingair inlet openings below said burner, a damper plate pivoted to thefloor and extending longitudinally a distance beyond the front and rearwalls of said compartment, rotation of said plate serving to controlsaid inlet openings, said compartment having an outlet opening throughthe rear Wall at the upper end thereof, a valve blade pivoted at anintermediate point to said rear wall and having a segmental end forcooperating with said outlet opening to contro the opening and closurethereof, the rear extended end of said damper plate having a slot andthe lower end of said valve blade extending into said 7 slot wherebyrotation of said damper plate to control the inlet openings will causesimultaneous swing of the valve blade/to control saidoutlet opening, anda handle secured to the forwardly extended end of said damper plate.

In witness hereof, I hereunto subscribe my name this 29th day of May, A.1)., 1911.

, THOMAS P. MURRAY. Witnesses:

J OHN A. THoMPsoN, CHARLES J. SCHMIDT.

Copier of this patent may be obtained'for five cents each, by addressingthe Commissioner of Patents,

Washington, 1). G."

